Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 9 - Section 9.6 - Conic Sections in Polar Coordinates - Exercise Set - Page 1030: 6


a. parabola. b. $y=-4$

Work Step by Step

a. Rewrite the given equation as $r=\frac{4}{1- sin\theta}$ and compare with the standard form. We have $e=1, ep=4, p=4$, and we can identify the conic section as a parabola. b. We can identify the location of the directrix as $y=-4$ or $4$ units below the pole.
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